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Unconventional Fluorescent and Multi-responsive Polyethyleneimine with LCST and UCST Behavior:Synthesis,Characterization and Biological Applications

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Chinese Journal of Polymer Science 2024年第6期42卷 826-837页

作者： Feng-Ming Yin li-li Wu shu-sheng li Xiao-Na Pan Xiao-li Zhu Xu-Bao Jiang Xiang Zheng Kong College of Chemistry and Chemical Engineering University of JinanJinan250022China Shandong Institute for Product Quality Inspection Jinan250102China College of Chemical Engineering Tianjin UniversityTianjin300072China

Non-aromatic fluorescent and multi-responsive materials,exhibiting inherent fluorescence emission and controlled phase change,have garnered significant attention in recent ***,the underlying interaction between their fluorescent properties and phase transition remains *** this study,we synthesized a series of catalyst-free aza-Michael addition-based polyethyleneimine(RFPEI)materials by reacting polyethyleneimine(PEI)with N-isopropyl acrylamide(NIPAM).The resulting RFPEI was comprehensively characterized,and demonstrated dual-phase transition behavior(LCST and UCST)in water,which could be finely tuned by adjusting its composition or external factors such as ***,upon UV irradiation(365 nm),RFPEI exhibited strong fluorescence *** further investigated the effects of NIPAM grafting percentage to PEI,polymer concentration,and pH on the LCST/UCST and fluorescent properties of RFPEI aqueous ***,we showcased the great potential of RFPEI as a versatile tool for physiological cell imaging,trace detection,and controlled release of *** study presents a novel class of stimuli-responsive fluorescent materials with promising applications in the field of biomedicine.

关键词： Polyethyleneimine Multi-responsiveness Intrinsic fluorescence emission Cell imaging Controlled drug release

Synthesis and Characterization of Novel Thiosemicarbazones Bearing Sugar Moieties

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Chemical Research in Chinese Universities 2006年第6期22卷 738-741页

作者： YANG Bo ZHANG shu-sheng li Hui-xiang College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China

Six novel thiosemicarbazones containing sugar and thiosemicarbazide moieties were synthesized by a five-step procedure using D-galactose and D-xylose as the starting materials and the corresponding glycosyl isothiocyanates as the intermediates. The target compounds were characterized by IR, ^1H NMR, and elemental analysis. The coupliug constants between H1 and H2 in the sugar rings, all fail within the range of J = 9. 2-10.0 Hz, confirming the β-configuration of the compounds.

关键词： Thiosemicarbazone Sugar Synthesis Characterization

A novel and simple pathway to synthesis of porous polyurea absorbent and its tests on dye adsorption and desorption

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Chinese Chemical Letters 2013年第4期24卷 287-290页

作者： shu-sheng li Xiang-Zheng Kong Xu-Bao Jiang Xiao-li Zhu College of Chemistry and Chemical Engineering University of Jinan

A novel one-step protocol for the preparation of porous polyurea material （PPU） through precipitation polymerization of toluene diisocynate （TDI） is presented. The process is based on step polymerization of one single monomer, TDI, with water in water-acetone mixed solvent. PPU is obtained without need for any porogen or additives, and no any chemical modification on the outcome polymer is necessary. The morphology, pore size and size distribution of PPU are characterized by scanning electron microscope and BET nitrogen adsorption. Taking acid fuchsine （AF） and Congo Red as dye examples in wastewaters, their adsorption on, desorption from PPU and the reusability of PPU were tested. Experimental conditions for AF adsorption were optimized with regard to pH, adsorption time, AF concentration and amount of PPU. Results demonstrate that the as-prepared PPU is of high performance in dyes adsorption and recycled use. This work presents therefore a novel and attractive candidate for removal of anionic dyes from wastewaters.

关键词： Precipitation polymerizationPorous polyureaDye removalisothermal adsorption

Syntheses,Structure and Biological Activities of 2-(1H-Benzo [1,2,3]triazole-1-yl)-1-(3-methyl-4-bromobiphenyl)-2-(1H-1,2,4-triazole-1-yl)ethanone

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Chemical Research in Chinese Universities 2007年第1期23卷 120-122页

作者： ZHANG shu-sheng WAN Jun li Xue-mei li Chun-li XU liang-zhong College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China

1,2,4-Triazole derivatives represent an interesting class of heterocyclic compounds and have become the most with rapidly expanding group of antifungal compounds the advantages of toxicity, high oral bioavailability, and broad spectrum of activity against several fun- gi, including most yeasts and folanentous fungi . The triazole fungicides are agrochemicals that are used world wide in the agricultural industry because of their wide spectrum of action, A variety of benzotriazoles exhibit growth-inhibiting activities against some microorganisms and other derivatives possessing anti-inflammatory properties.

关键词： Triazole derivative Cyrstal structure Biological activity

Preparation and Formation Mechanism of Porous Polyurea by Reaction of Toluene Diisocyanate with Water and Its Application as Adsorbent for Anionic Dye Removal

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Chinese Journal of Polymer Science 2015年第8期33卷 1196-1210页

作者： shu-sheng li Hui Han 朱晓丽 Xu-bao Jiang 孔祥正 College of Chemistry and Chemical Engineering University of Jinan College of Chemistry and Chemical Engineering Shandong University

A novel and easy one-step protocol for preparation of a new porous material, polyurea （PPU）, is reported, which is accomplished through a precipitation polymerization of toluene diisocyanate （TDI） in mixed solvent of H20-acetone without need for surfactant and porogen. Effects of TDI concentration, mechanical stirring, solvent composition and TDI addition rate on PPU structure are studied. Surface morphology and pore structure of PPU are characterized by scanning electron microscopy and Hg intrusion. Chemical structure of the PPU polymer is investigated using NMR, XRD and FTIR. Mechanism of pore formation is discussed. The obtained PPU is used as adsorbent for anionic dyes adsorption investigation. Two anionic dyes, remazol brilliant blue R and acid fuchsine, are tested. The results indicate that the as-prepared PPU is of high performance in dye adsorption and recycled use. This study provided therefore a facile route to the preparation of a novel and attractive adsorbent candidate for removal of anionic dyes from wastewaters.

关键词： Precipitation polymerization Porous polyurea Toluene diisocyanate Anionic dyes adsorption.

Boundedness of Marcinkiewicz Integrals in Weighted Variable Exponent Herz-Morrey Spaces

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Communications in Mathematical Research 2018年第4期34卷 371-382页

作者： XIAO DAN shu li-sheng Ji You-qing Department of Basic Courses Anhui Professional College of ArtHefei230001 School of Mathematics and Statistics Anhui Normal UniversityWuhuAnhui241003 不详

In this paper, under natural regularity assumptions on the exponent function, we prove some boundedness results for the functions of littlewood-Paley, Lusin and Marcinkiewicz on a new class of generalized Herz-Morrey ... 详细信息

关键词： Marcinkiewicz integral variable exponent Muckenhoupt weight Herz-Morrey space

Vector-valued Inequalities for Commutators of Singular Integrals on Herz Spaces with Variable Exponents

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Communications in Mathematical Research 2017年第4期33卷 363-376页

作者： WANG li-WEI QU MENG shu li-sheng Ji You-qing School of Mathematics and Physics Anhui Polytechnic University School of Mathematics and Computer Science Anhui Normal University 不详

Based on the theory of variable exponents and BMO norms, we prove the vector-valued inequalities for commutators of singular integrals on both homogeneous and inhomogeneous Herz spaces where the two main indices are variable ***, we show that a wide class of commutators generated by BMO functions and sublinear operators satisfy vector-valued inequalities.

关键词： variable exponent Herz spaces commutator singular integral